Mechanical stoker for promoting smokeless combustion.



KS YANG.

MEGEANGAL STOKER TEUR PROMOTING SMOKELESS UMBUSTGN.

AFPLIUATION FILED JUNE 26, 1912. y jg@ l :mm :a wifi.

USHil--STEET K. YANG, Mfxcszmnm wenn you momoffme :mom-amg sommusfmm.APYLIGATION FILED JUNE 25, 1912.

Patented Nov. i0, 1914 YANG. MEHANIGAL STOKER FOR PRMTING SMUK'ELESSOMBUSTION.

MYLIGMIQN NLRB JUNE ze, 1912l mmm@ 'thusv moving the rear vgrate mover 3forward or outwardly from the furnace.

The present invention contemplates' the use of two rows of grate barsarranged in stepped order, viz. front grate bars 12, and rear grate bars12. The former have suitable cutaway portions or-recesses in their lowersurfaces at the front ends adapted to alternately engage with one or theother of the grate movers 3, 3'; that is to say, while one grate bar ofthe front rank rests on top bars engagingwith the rear moverl 3 areadjacent to the inner face of the front mover 3,50 that when the latteris moved in a back ward direction, or toward the furnace, the rear moverwill at the same time be moved I in that direction.

.y half burnt fuels `of the rear grate.

' spectively at the top To insure even distribution of the fuel, I

,provide upon each of the front row ofgrate bars projections orpyramidalknobs 13 as shown in Fig. 4, which, as the bars reciprocate, act -asmixers and disperse the fuel evenlyover the surface of the grate bars.

At the lower rear end of each of the front grate bars 12, a small lug isprovided, which vengages with a corresponding cut away portion or roove15, formed in the upper faces of each ar of the rear grate 12 as shownin Fig. 1.

n practice it lis found that the fuel'is liable to be largely consumedin the front grate 12 before it -is passed onto therear ate 12 leavingon this later grate only small quantities of soft coke which is liableto admit su lus airinto the furnace,thereby adversel a ecting theefficiency of the furnace. o obviate this defect, the grooves -15 in therear grate bars are made longer than the width of the lug 14, so thatthe travel of the front grate is greater than that This insures thefuels accumulating to a larger extent upon the 'rear grate andconsequently revents the admittance of an excess of air into the rear ofthe furnace. 16 is an ash-pit tray upon which said rear grate bars 12lare mounted. This tray serves as a artition for separating ropping)through the spaces between the grate ars from the a ready burnt up fuelsor ashes falling over the back ends of the rear grate bars 12. 17 and 17are two sliding doors fitted reand bottom of the said 16 as shown in thedrawing. lVith tray room is smaller flues where insutnc allowed for theinstallation of such trays, a suitable flue protector may be used so asto utilize the same as a support for the rear Grate.

Above lthe front portion of the front grate -pyranuidal or othersuitable projection 19 preferably in the middle portion of the rear end.20 is a series of obliquely arranged air passages extending oppositelyfrom and parallel to the sides of said pyramidal projection 19 as shownin Fig. 4.

The pyramidal projection 19, serves to accumulate thicker in the centerthan it does at. the sides of the grate of the furnace. The obliqueperforations 2O serve as air passages for igniting the fuel before it-falls upon the surface of the grate bars.

19 is a rib extending' across the entire 18 which serves to return orforce back any burningfuel and thus encourages and expeldites theignition of fresh fuel falling on top of the dead plate. This will leaveno useless pace-between the dead plate and the grate ars.

Movably mounted upon the dead plate 18 lis a fuel conveyer whichconsists of the casing 21, the back wall of which is inclined and has anumber` of air passages 23 therethrough and is provided with one or morebuckets 24 according to the size of the furnace as shown in Figs. 1, 2,and 4. This fuel conveyer serves not only as a forwarder of the fuelbutalso as a coking plate or chamberl Two lugs 25 are arranged in themiddle bottom portion of the part of the casing 21. Each lug isprovided-with a vertical aperture 26 which is adapted to receive asuitable connectin rod 29, which rod engages vat its lower en with oneof a specially elongated grate bar of the front grate and thusreciprocates the casing. To adjust the posi\ tion of the connectin rod29 and conseuently the position o ,the casing 21 relatively to the deadplate, a number of small blocks 28 are used to be inserted in the spacebetween the rod 29 and two lugs 27 which are provided on the uppersurfaces of the front end portion of the said elongated bar, as shown inFigs. able screw bolt ho ding the said connecting rod 29 in the aperture26'. By this construction -the position of the said connecting rod willbe readily ad'usted by increasing or decreasing the num r of the saidadjustin blocks 28 and'consequentl the movement o the conveyer will b'eregu ated at will, which in turn regulates the feeding of thc fuel. frAbove the dead plate and in the front ed crownI late 31 which is adaptedto serve as a hot raft creating member by heating 12.is placed asuitable dead plate 18, havingv eliminate the usual tendency of the fuelto 'width of the lower surface of the dead plate4 1,4and7.. 30isasuitlpart of the furnace 1s an'internally mountmiem/.1

the eine or steam Jfrom the injector This injector may consist of adepend-ing tube et the front of the furnace, the lower end gJening intothe furnace as illustrated at iwi.

"lhe feeding hopper 33, which ia fitted with a sliding door 34,'opensdirectif,V to lthe conveyerhelow, and the Airaporized matters evolvedfrom the fuels above the coking plate will .be thoroughly mixed 'withthe jets of heated air or steam issuing fromthe inector whereby thecomplete ignitiaia of an inflammable gas is insured andthe products ofcombustion are caused to issue in a long smokeless flame.

ll`o apply 'my invention to the furnace of a Water tube boiler, o1 toother furnaces ofv a like class, l provide Vas shown in Fig. l2,suitable Vpartitions or walls such. as 353, 3G, in the hack of the ashrpit. I also .provide a suitable Water tank il?. In order to keep theash-pit entirely .sealed wilh'Water, the lower end oi the Said wall 36is immersed in the water as-showlnso that the ashes or clinlicrs can betaken out without admitting any surplus air into the furnace. A

io prevent fused fuel or clinker from adhering upon,the brick work,chrome bricks may be used at the places where the rlinlrers aregenerally found to adhere with the brick work, 4for instance as with thecrown pluie or upon the grate bars.

From 'the above description, it 1will be anders-rood that the coal fedinto the. hopper will be comlucird through vthe adjusting door 2M, lothe point above the coking plaie which forms the front part of ,theconveycr. When the furnace is first lighted it is necessary to ll up thesaid coking portion with. alreadyignlted fuel prior to the feeding ofthe hopper, and therefore the fuel' .falling through the hopper 'will behighly heated at the point above' the eokingl plate Where it vaporizcsand by virtue of the movement of the conveyor passes gradually to the.dead plate to beignited thereon before it is carried down to 'the top-of the grate bars.

Having now fully described my inverntion, what l claim is:

ln a combustion apparatus, the c0rnbination of'two grate movers, a eetof bars connected with each of said movers, means for moving said moversinwardly together, andnioving said movers outwardly independenly o-ieach other, a dead plate mounted above said grate bars and havingavclownwai-diy projecting lug extending across the .-unie at sor-neVdistance from the inner end.

"enacting with said bars and an upwardly lextending lng for spreadingthe iuel, andalso having a series of an' passages 1n the inner endthereof, and a fuel conveyor mounted on said plate and arranged formoving' the fuel lfmgitudinally thereof.

la testimony whereof I affix my signature in presence ofiwo witnesses.

` KHCIIIRO YANG.

Wil nesses Unten liiflunam,

lla ninna YosUMURA.

